Results of surveys sometimes are reported in the popular media with subtle but important qualifying statements. Consider , for example, the following statement: “More than two-thirds of those responding…” Each of these statements alludes to a different and important number that must be reported if survey data are to be interpreted meaningfully. (a) What value (i.e., the size of what group) serves as the denominator for computing a proportion such as “two-thirds of those surveyed? What value serves as the denominator for computing “three-fourths of those responding? Why is it so important that both numbers always be reported with survey data? (b) What specific aspect of Snyderman and Rothman’s instructions to respondents indicates the need for careful reporting of numbers of those responding?